Sample Activity

A = bh-2×½(½(b-a))h | A = ½ah+½bh |
Rotate and make a parallelogram |
A = h(b-(½(b-a))) |
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A = ½(a+b)h | A = (½a+½b)h |
Split into three triangles using the midpoint of the top |
Split in half and rearrange to make a rectangle |

A = ½bh+2×½×½ah |
Add two triangles to make a parallelogram |
Split into three triangles using the midpoint of the base |
Split into two triangles |